JP5452385B2 - Combine pre-processing section - Google Patents

Description

  The present invention relates to a pre-processing unit for a combine that includes a handling depth conveying body that changes the handling depth of cereals.

  A handling depth transport body is arranged in the middle of the transport path of the cereals that are harvested and transported backward, and the handling depth transport body is supported so as to swing up and down with the front portion as a fulcrum, on the rear side of the handling depth transport body Combine pre-processing for changing the handling depth of the cereal by changing the holding position of the cereal when the arranged conveying body receives the cereal from the handling depth conveying body by vertically swinging the handling depth conveying body The part is conventionally known.

  In this configuration, a link mechanism such as a crank is operated by the power of the electric motor and is swung up and down by the link mechanism. However, there is a case where the handling deep conveyance body cannot be swung up and down smoothly by backlash or the like. Corresponding to this, a pre-processing unit for a combine described in Patent Document 1 provided with a linear actuator such as an electric cylinder that drives a handling deep conveying body up and down by expansion and contraction is known.

Japanese Patent No. 4288096

However, there are cases where the pre-processing section of the combine described in the above-mentioned document does not play smoothly due to the backlash due to insufficient strength on the side of the support member on which the linear actuator is supported.
This invention makes it a subject to provide the pre-processing part of the combine which can carry out the rocking | fluctuation depth of a grain deeply stably by the expansion-contraction operation | movement of a linear actuator, and can change the handling depth of a grain straw smoothly.

  In order to solve the above problems, the pre-processing unit of the combine according to the present invention arranges the handling depth transport body 19 in the middle of the transport path of the cereals that are cut and transported backward, and the handling depth transport body 19 serves as a fulcrum. Is provided with an up and down linear actuator 29 that is driven to swing up and down by a telescopic operation, and a transport body 21 disposed on the rear side of the handle depth transport body 19 is provided. In a pre-processing unit of a combine that changes the handling depth of the cereal by changing the holding position of the cereal when receiving the cereal from the handling depth carrier 19 by vertically swinging the handling depth carrier 19. A transmission mechanism for transmitting power is provided on the deep carrier 19 side, and the upper end side of the linear actuator 29 is connected to and supported by a support frame 33 that protrudes upward from the transmission case 4 constituting a part of the frame portion. On the other hand, the handling depth carrier 19 The lower end side of the linear actuator 29 is connected and supported on the rear side of the fulcrum on the surface side, and the handling depth transport body 19 is swung downward on the shallow handling side by the extension operation of the linear actuator 29. It is characterized by that.

  Secondly, a connecting portion 34 for connecting and supporting the linear actuator 29 is provided on the lower surface side of the handling depth transport body 19, and when the linear actuator 29 expands and contracts in a state of being connected to the connecting portion 34, the handling depth transport body 19. The connecting portion 34 is also arranged so that the linear actuator 29 rotates with respect to the handling depth carrier 19 also about the second rotation axis D orthogonal to the first rotation axis C that rotates the linear actuator 29 relative to It is characterized by comprising.

  Thirdly, a detection body 49 that moves integrally with the extension operation of the linear actuator 29 is provided, and a detection switch 53 that is turned on and off by the detection body 49 is provided so that the linear actuator 29 is within the operating limit range. Arranged on the expansion side and the contraction side within the limit expansion / contraction range, which is the range in which the detection body 49 moves when it expands / contracts, and supports the pair of detection switches 53 so that the position can be adjusted within the limit expansion / contraction range by the support body 47 The linear actuator 29 is expanded and contracted within a set expansion / contraction range that is a range in which the detection body 49 moves between the pair of detection switches 53 based on the on / off detection of the pair of detection switches 53.

  According to the configuration of the present invention, the linear actuator is supported on the transmission case that forms a part of the frame and has high strength by the support frame, and the lower surface side of the handling deep conveying body is moved to the transmission case side by the linear actuator. Because it is connected and supported, the support strength of the handling depth transport body is improved, the backlash is suppressed, the handling depth transport body can be moved up and down stably, and the handling depth of the cereal can be changed smoothly. is there.

  A connecting portion for connecting and supporting the linear actuator is provided on the lower surface side of the handling depth transport body, and the linear actuator is rotated with respect to the handling depth transport body when the linear actuator expands and contracts while being connected to the connection portion. If the connecting portion is configured so that the linear actuator rotates with respect to the handling depth conveyance body also around the second rotating shaft orthogonal to the first rotating shaft, the lower end portion of the linear actuator is connected to the connecting portion. The degree of freedom is increased, the backlash of the linear actuator supported by the support frame is allowed, and the assembly work for connecting the lower end of the linear actuator to the connecting portion can be performed more easily. There is an effect of becoming.

  In addition, a detection body that moves integrally with the extension operation of the linear actuator is provided, and a detection switch that is turned on and off by the detection body is connected to the detection body when the linear actuator expands and contracts within the operating limit range. It is arranged on the extension side and the reduction side in the limit expansion / contraction range, which is the moving range, and the pair of detection switches are supported by the support so that the position can be adjusted within the limit expansion / contraction range, and the on / off detection of the pair of detection switches Based on the above, by extending and retracting the linear actuator within the set expansion / contraction range, which is the range in which the detection body moves between the pair of detection switches, the handling depth conveyance body is moved up and down in accordance with the length of the grain to be cut. Since the moving range can be easily changed, there is an effect that it is not necessary to widen the set expansion / contraction range in order to improve versatility.

It is a side view of a combine to which the present invention is applied. It is a side view of the pre-processing part of this combine. It is a side view at the time of deep handling of the handling depth conveyance body. It is a side view at the time of shallow handling of a handling deep conveyance body. It is a perspective view of the state which connected and supported the lower end part of the handling depth conveyance body to the connection member. It is a perspective view of the state which removed the lower end part of the handling depth conveyance body from the connection member. It is a perspective view of the state where the lower end part of the handling deep conveyance body was removed from the connecting member, and was separated. It is a perspective view which shows the structure of an expansion-contraction range setting unit. It is a principal part enlarged view of FIG.

  FIG. 1 is a side view of a combine to which the present invention is applied, and FIG. 2 is a side view of a pre-processing unit of the combine. This combine is connected to a traveling machine body 2 supported by a pair of left and right crawler type traveling devices 1 and 1 which are traveling parts, and is connected to the front part of the traveling machine body 2 so as to be able to be driven up and down, for example, harvesting cereals in a field And a preprocessing unit 3 for performing the above.

  The preprocessing unit 3 is connected to the traveling machine body 2 so as to be movable up and down by a vertical cylinder 4 extending obliquely downward and forward. The vertical cylinder 4 functions as a main frame of the preprocessing unit 3, and also on the traveling machine body 2 side. It also functions as a transmission case in which a transmission mechanism such as a transmission shaft that transmits the engine power from the engine to the pre-processing unit 3 side is incorporated. In other words, the vertical cylinder 4 constitutes a part of the frame portion of the preprocessing unit 3.

  A plurality of dividers 6 projecting forward are arranged in parallel in the left-right direction on the lower end side of the front part of the pretreatment unit 3, and a pulling device 7 rising upward is arranged on the rear side between the adjacent dividers 6. Further, at the rear of the lower end portion of the pulling device 7, there is a strainer-striking device 8 that rakes back the strainer side of the raised cereal, and a tip scraper that rakes the tip side of the cereal backward. The cutting device 9 and a cutting blade 11 that cuts the cereal culm that has been pulled up and scraped are installed, and the culm that is cut by the cutting blade 11 is moved backward by the conveying device 12 disposed on the rear side. Conveyed to the side.

  At the time of the cutting operation on the farm field, this combine runs the farm field with the preprocessing unit 3 lowered. During this travel, the cereals weeded by the divider 6 of the pre-processing unit 3 are raised by the pulling device 7 and cut by the cutting blade 11, and are transported backward to the traveling machine body 2 by the transport device 12, Passed to the traveling machine body 2 side.

  On the traveling machine body 2 side, the stock of the cereals from the pre-processing unit 3 is received on the front end side of the feed chain 13 in the front-rear direction arranged on the left side (hereinafter simply “left”) side of the traveling machine body 2. . The feed chain 13 is transported backward while holding the head side of the culm in a state in which the tip side of the cereal is inserted into a handling room (not shown) of the threshing unit 14 installed on the left part of the traveling machine body 2. Is configured to do.

  The portion of the cereal that is conveyed rearward is handled by a handling cylinder (not shown) and is discharged from the rear end of the traveling machine body 2 to the outside of the machine. In such a threshing process by handling, the treatment depth varies depending on the amount of cereal inserted into the handling room, and this treatment depth depends on the culm length of the culm and the holding position of the culm by the feed chain 13. It depends on. For this reason, in order to hold | maintain the handling depth of a corn straw optimally according to the cocoon length of a corn straw, it is necessary to change suitably the holding | maintenance position of the grain straw by the feed chain 13, and this means is mentioned later. .

  The processed product subjected to the threshing process is dropped and supplied to a sorting room (not shown) below the handling room, and sorted into grains and sawdust. The grain is conveyed to the grain tank 16 side on the right side of the rear half of the traveling machine body 2 by the whipping cylinder and is accommodated in the grain tank 16. Sawdust and the like are discharged from the rear end of the traveling machine body 2 to the outside of the machine. The grain in the grain tank 16 is discharged out of the machine from the distal end portion of the auger 17 whose base end portion is supported at the rear end portion of the traveling machine body 2 so as to be able to turn left and right and drive up and down.

Next, based on FIG. 2, the structure of a conveying apparatus is demonstrated.
The transport apparatus 12 includes a stock transporter 18, a handling depth transport 19, and a rear transport 21 (transport) in order from the front side. The stock transport 18, the deep handling transport 19 and the rear transport. A tip transport body 22 is provided above the body 21.

  The stock former transport body 18 is configured to hold the stock base side of the harvested cereal and to transport the cereal backward toward the handling depth transport body 19. The handling depth transport body 19 is configured to receive the stock side of the culm from the stock transport body 18 and to transport the cereal back toward the rear transport body 21. The rear transport body 21 is configured to receive the cereal stock side from the handling depth transport body 19 and to transport the cereal rearward toward the feed chain 13 described above.

  In other words, the stock source transport body 18, the handling depth transport body 19, and the rear transport body 21 form a transport path on the stock base side of the cereal. The tip transport body 22 is arranged on the upper side of the stock source side transport path of the cereal, and the tip transport body 22 transports the tip side of the cereal to the rear side without being disturbed. Incidentally, a plurality of stock transporters 18 are arranged on the left and right sides, and the plurality of stock transporters 18 are used to treat the grain culm cut across the entire width direction of the pretreatment unit 3 as a front view deep transporter. It is configured to join the 19 side and take over to the handling depth transport body 19.

  Moreover, the handling depth conveyance body 19 is arrange | positioned in the left side vicinity of the vertical cylinder 4 so that the whole may rock | fluctuate up and down with the front part of self as a fulcrum. When the handling depth transport body 19 is swung up and down, the vertical position of the rear portion of the handling depth transport body 19 is changed with respect to the rear transport body 21, and the grain when the cereal is taken over from the handling depth transport body 19 to the rear transport body 21 The holding position of the bag is changed. By changing the holding position, the holding position of the cereal when the cereal is handed over from the rear transport body 21 to the feed chain 13 is also changed, thereby changing the amount of cereal inserted into the handling chamber. That is, in this combine, the handling depth of the cereal is changed by the vertical swing of the handling depth carrier 19.

  By the way, in this combine, a plurality of tip sensors 23 are provided in the vicinity of the most downstream (hereinafter simply referred to as “downstream”) side of the tip transport body 22 so that the optimum handling depth according to the culm length of the cereal is obtained. Based on the detection result of the tip sensor 23, the handling depth carrier 19 is controlled to swing up and down.

Next, the handling deep conveyance body will be described in detail with reference to FIGS.
FIG. 3 is a side view when the handling depth transport body is deeply handled, and FIG. 4 is a side view when the handling depth transport body is shallowly handled. The handling depth conveyance body 19 is rotatably supported by a cylindrical support member 24 that is integrally formed so as to protrude from a middle portion of the vertical cylinder 4 so that the entire handling depth body 19 swings up and down. In other words, a fulcrum shaft A for swinging the handling depth conveying body 19 is set on the axial center of the cylindrical support member 24.

  Inside the support member 24, a power take-out mechanism (not shown) that takes out power from the vertical cylinder 4 and transmits it to the handling depth transport body 19 is incorporated. The transport body 19 is transported and driven. Specifically, the handling depth carrier 19 is mainly used for a driving sprocket 26, a driven sprocket (not shown), a frame 25 supporting the driving sprocket 26 and the driven sprocket, and the driving sprocket 26 and the driven sprocket. The drive sprocket 26 is rotationally driven by the power of the power take-off mechanism, and the transport chain 28 is driven so as to transport the cereal stock to the downstream side, which is the downstream side. .

  Further, the handling depth carrier 19 is driven to swing up and down around the fulcrum axis A described above by an electric cylinder 29 (linear actuator) in the vertical direction that expands and contracts. The electric cylinder 29 includes a cylinder portion 31 that is a non-operating portion and a piston portion 32 that is an operating portion that moves in the cylinder portion 31 in the axial direction. It is configured to operate.

  The electric cylinder 29 is configured such that the piston portion 32 is located on the lower side and the cylinder portion 31 is located on the upper side, and the upper end portion of the cylinder portion 31 (the upper end portion of the electric cylinder 29) extends from the vertical cylinder 4. On the other hand, the lower end portion of the piston portion 32 (the lower end portion of the electric cylinder 29) is lowered from the lower surface side of the handling deep conveying body 19 while being rotatably connected to and supported by a rod-like support frame 33 protruding upward. Are connected to and supported by a rod-like connecting member 34 (connecting portion) that is formed to project freely.

  The support frame 33 is disposed behind the place where the support member 24 is installed in the vertical cylinder 4, and the front half is perpendicular to the handling depth conveyance body 19 with respect to the base half on the vertical side of the vertical cylinder 4. It is bent. The front end portion of the support frame 33 is located behind the fulcrum shaft A described above. A support pin 36 parallel to the fulcrum axis A is inserted and supported at the tip of the support frame 33, and the electric cylinder 29 is attached to the support pin 36 so as to be rotatable. In other words, the rotation axis B of the electric cylinder 29 is set in the axial direction of the support pin 36, and the electric cylinder 29 is connected to the distal end side of the support frame 33 so as to be rotatable around the rotation axis B. Incidentally, the upper end portion of the electric cylinder 29 is detachably connected to the support frame 33.

  The connecting member 34 is formed such that a distal end side half portion is bent toward the vertical cylinder 4 side with respect to the base end side half portion protruding downward from the lower surface of the frame body 25 of the handling depth transport body 19, and the support shaft A and the rotating shaft. A shaft portion 39 substantially parallel to the movement axis B is formed. The shaft portion 39 is located behind the support member 24 and below the support pin 36. The distal end portion of the shaft portion 39 is rotatable around a first rotation axis C parallel to the rotation axis B, and around a second rotation axis D orthogonal to the first rotation axis C. The lower end portion of the electric cylinder 29 is attached and supported so as to be freely rotatable. That is, the connecting member 34 functions as a member for connecting and supporting the electric cylinder 29 to the lower surface side of the deep conveyance body 19.

  According to such a configuration of the support frame 33 and the connecting member 34, when the electric cylinder 29 is expanded and contracted, the electric cylinder 29 rotates around the axis of the rotation axis B with respect to the support frame 33 and is connected. The member 34 is rotated about the first rotation axis C with respect to the member 34, and as a result, the handling depth carrier 19 is vertically swung around the axis of the fulcrum axis A. With this configuration, the electric cylinder 29 also functions as a member that supports the deep handling body 19 on the high-strength vertical cylinder 4, so that the deep handling body 19 moves up and down in a stable posture due to the expansion and contraction of the electric cylinder 29. It is driven to swing.

  When the handling depth transport body 19 is swung upward about the support shaft A on the front side, the downstream end of the handling depth transport body 19 comes close to the upstream end of the rear transport body 21, and the feed chain 13 is in a deep handling state in which the amount of insertion of the cereal into the handling chamber is increased (see FIG. 3), while the handling depth transport body 19 is swung downward around the support shaft A on the front side. Shallow handling in which the downstream side end of the deep handling body 19 is spaced downward relative to the upstream side end of the rear transport body 21 and the amount of insertion when the grain is inserted into the handling chamber by the feed chain 13 is reduced. By the way, the expansion / contraction range of the electric cylinder 29 can be set by an expansion / contraction range setting unit 46 described later.

Next, the configuration of the first rotation shaft and the second rotation shaft will be described with reference to FIGS.
FIG. 5 is a perspective view of a state in which the lower end portion of the handling depth transport body is connected to and supported by the connecting member, and FIG. 6 is a perspective view of a state in which the lower end portion of the handling depth transport body is removed from the connection member. 7 is a perspective view of a state in which the lower end portion of the handling depth conveyance body is removed from the connecting member and separated.

  The shaft portion 39 is formed so that the cross-sectional shape is circular, and a collar 41 is externally mounted on the shaft portion 39 so as to be rotatable around the shaft, and the connecting pin 42 is directed outward from the collar 41. Projected integrally. The connecting pin 42 protrudes from the outer periphery of the collar 41 so that the axis of the connecting pin 42 is orthogonal to the axis of the shaft portion 39.

  On the other hand, a connecting hole 43 perpendicular to the axial direction of the cylinder part 31 and having an opening side directed to the connecting pin 42 is formed at the lower end of the piston part 32 of the electric cylinder 29. The above-described connecting pin 42 is inserted into and supported by 43 so as to be rotatable about its own axis. In this way, a retaining ring 44 that prevents the connecting pin 42 from coming out of the connecting hole 43 is attached to the outer periphery of the connecting pin 42 inserted through the connecting hole 43 and projecting from the piston portion 32 at the tip side. It is externally detachable via.

  As described above, the electric cylinder 29 is connected to the connecting member 34 by the collar 41 so as to be rotatable about the axis of the shaft portion 39 parallel to the support shaft A, and the connecting pin 42 is inserted into the connecting hole 43. It is connected to the connecting member 34 so as to be rotatable around the axis of 42. That is, the axis of the shaft portion 39 is set to the first rotation axis C described above, and the axis of the connecting pin 42 orthogonal to the first rotation axis C is set to the second rotation axis D described above.

  In this way, in addition to the first rotation axis C, the second rotation axis D orthogonal to the first rotation axis C is set so that the upper end side of the electric cylinder 29 is connected and supported to the support frame 33. In this case, even when backlash occurs in a direction orthogonal to the connecting pin 42, the rotation angle of the electric cylinder 29 around the second rotation axis D with respect to the connecting member 34 is changed so that the connecting pin 42 is moved to the electric cylinder 29. Since the connecting hole 43 can be removably inserted into the connecting hole 43, the operation of attaching and detaching the electric cylinder 29 from the connecting member 34 can be easily performed. Incidentally, the play in the direction of the connecting pin 42 can be eliminated by the rotation around the rotation axis B which is the axis of the support pin 36 described above.

  According to the first rotating shaft C and the second rotating shaft D having such a configuration, the lower end portion of the piston portion 32 is attached to the connecting member 34 after the upper end portion of the cylinder portion 31 is attached to the support frame 33. Thus, the mounting operation of the electric cylinder 29 is performed. During maintenance, as shown in FIGS. 6 and 7, the lower end of the electric cylinder 29 is removed from the connecting member 34 while the upper end of the electric cylinder 29 is connected to and supported by the support frame 33 (see FIG. 6). Subsequently, the handling depth carrier 19 is further swung to a lower position than when the electric cylinder 29 is fully extended, so that the inside of the conveying device 12 (particularly, the corn straw of the stock source carrier 18 is joined). It is possible to easily perform maintenance of the parts to be performed.

Next, the configuration of the expansion / contraction range setting means will be described with reference to FIGS.
FIG. 8 is a perspective view showing the configuration of the expansion / contraction range setting unit, and FIG. 9 is an enlarged view of the main part of FIG. The expansion / contraction range setting unit 46 includes a plate-like support bracket 47 (support) fixed to the cylinder portion 31 of the electric cylinder 29 and the entire length of the guide hole 48 in the expansion / contraction direction of the electric cylinder 29 formed in the support bracket 47. The detection body 49 is slidably engaged in the direction, the detection switches 54 and 56 are respectively installed at both ends of the guide hole 48 in the full length direction of the support bracket 47, and the upper end is formed in the expansion / contraction direction of the electric cylinder 29. A slide bar 51 having a detection body 49 fixed to the part, and a fixture 52 for attaching and fixing the lower end of the slide bar 51 to the piston part 32 of the electric cylinder 29 are provided.

  When the electric cylinder 29 is expanded and contracted, the detection body 49 connected to the piston portion 32 by the slide bar 51 reciprocates in the expansion and contraction direction integrally with the piston portion 32 within a range of moving in the guide hole 48. The guide hole 48 is arranged and configured so that the entire length is within a limit expansion / contraction range that is a movement range of the detection body 49 when the electric cylinder 29 is expanded / contracted to the maximum extent (within the operation limit range).

  For this reason, the detection body 49 that has moved to the end portion on the reduction side in the full length direction of the guide hole 48 turns on the reduction side detection switch 54 that is a detection switch on the end portion side, while the extension of the guide hole 48 in the full length direction. The detection body 49 that has moved to the side end portion turns on and operates the extension side detection switch 56 that is a detection switch on the end portion side, and the detection body 49 is located at both ends of the guide hole 48 in the full length direction. If not, the pair of detection switches 54 and 56 are held off.

  A control unit (not shown) configured by a microcomputer or the like detects the on / off of the pair of detection switches 54, 56, and the control unit detects the on / off detection of the detection switches 54, 56 based on the on / off detection of the detection switches 54, 56. Control expansion and contraction. Specifically, the reduction operation of the electric cylinder 29 is stopped by turning on the reduction-side detection switch 54, and the extension operation of the electric cylinder 29 is stopped by turning on the extension-side detection switch 56.

  That is, due to the arrangement configuration in which the guide hole 48 is positioned between the pair of detection switches 54 and 56, the range in which the detection body 49 moves within the guide hole 48 becomes the set expansion / contraction range of the electric cylinder 29. This set expansion / contraction range is such that the support bracket 47 and the attachment 52 are moved together in the expansion / contraction direction of the electric cylinder 29, and the fixing position of the support bracket 47 to the cylinder part 31 and the fixing position of the attachment tool 52 to the piston part 32 are determined. It can be changed by changing, and more specifically, the set expansion / contraction range is changed in the expansion / contraction direction within the limit expansion / contraction range without changing the range.

  In addition, you may change the position within the limit expansion-contraction range of a setting expansion-contraction range by changing the fixing position to the fixture 52 of the slide bar 51. FIG.

  In the above-described example, the other end side of the slide bar 51 to which the detection body 49 is fixed to one end side is directly connected and fixed to the piston portion 32 by the attachment 52, but the slide bar 51 and the attachment 52 are fixed. An elastic member such as a compression spring may be interposed between the two. The elastic member is elastically deformed when the electric cylinder 29 is further extended from the state in which the detection body 49 is in contact with the expansion-side detection switch 56 and the detection switch 56 is turned on. When the predetermined value or more is reached, the power supply stop means such as a fuse is activated, the power supply to the electric cylinder 29 is stopped, and the extension operation of the electric cylinder 29 is stopped. With this configuration, even when an abnormality occurs in the on / off detection of the extension side detection switch 56, the extension operation of the electric cylinder 29 can be stopped by the power supply stop unit.

3 Pretreatment section 4 Vertical cylinder (transmission case)
19 Handling depth conveyance body 21 Back conveyance body (conveyance body)
29 Electric cylinder (linear actuator)
33 Support frame 34 Connection member (connection part)
47 Support bracket (support)
49 Detecting body 54 Reduction side detection switch (detection switch)
56 Extension side detection switch (detection switch)

Claims (3)

  A handling depth transport body (19) is arranged in the middle of the transport path of the grain straw that is cut and transported rearward, and the handling depth transport body (19) is supported so as to swing up and down with the front portion as a fulcrum. Is provided with a linear actuator (29) in the vertical direction for vertically swinging the handling depth transport body (19), and the transport body (21) disposed on the rear side of the handling depth transport body (19) In the pre-processing unit of the combine that changes the handling depth of the cereal by changing the holding position of the cereal when receiving the cereal from the body (19) by the vertical swing of the handling depth transport body (19), The linear actuator (33) is mounted on the support frame (33) formed upwardly from the transmission case (4) constituting a part of the frame portion with a transmission mechanism for transmitting power on the deep conveyance body (19) side. 29) While connecting and supporting the upper end side, The lower end side of the linear actuator (29) is connected and supported to the rear side of the fulcrum on the side, and the handling deep conveying body (19) is located on the shallow handling side by the extension operation of the linear actuator (29). Combine pre-processing unit that swings to the side.   When a connecting portion (34) for connecting and supporting the linear actuator (29) is provided on the lower surface side of the handling deep conveying body (19), and the linear actuator (29) expands and contracts in a state of being connected to the connecting portion (34). The linear actuator (29) also moves around the second rotational axis (D) orthogonal to the first rotational axis (C) for rotating the linear actuator (29) relative to the handling depth carrier (19). The pre-processing part of the combine according to claim 1, wherein the connecting part (34) is configured to rotate with respect to the handling deep conveying body (19).   A detection body (49) that moves integrally with the extension operation of the linear actuator (29) is provided, and the detection switches (54, 56) that are turned on and off by the detection body (49) are connected to the linear actuator ( 29) is arranged on the extension side and the reduction side in the limit extension / contraction range, which is the range in which the detection body (49) moves when it extends / contracts within the operation limit range, and the pair of detection switches (54, 56). A support body (47) is supported so that the position can be adjusted within the limit expansion / contraction range, and a detection body (54) is detected between the pair of detection switches (54, 56) based on the on / off detection of the pair of detection switches (54, 56). The pre-processing unit for a combine according to any one of claims 1 and 2, wherein the linear actuator (29) is expanded and contracted within a set expansion / contraction range in which 49) moves.

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